I voted .50 cal, too... I haven't even taken my 7mm out of the case since getting mine. I've dropped deer at 100yds with iron sights, so, I feel comfortable shooting out to 150 yds with mine; but, I do use 150gr of pellets and power-belt bullets. I figure, if the velocity isn't enough to kill one, the weight of the 285gr. bullet will at least knock it senseless for enough time for me to get up there and beat it silly with a stick.